Fwd: [maxima - Help] memory allocation problem

hello all -- i am forwarding to the mailing list 
this message which was posted via the SF help system.
the original poster's email address appears to be
laplace_friend at users.sourceforge.net.

just glancing at the problem, i wonder if maxima knows how
to solve equations which contain an absolute value.

hth
robert dodier

--- "SourceForge.net" <noreply at sourceforge.net> wrote:

> To: noreply at sourceforge.net
> From: "SourceForge.net" <noreply at sourceforge.net>
> Subject: [maxima - Help] memory allocation problem
> Date: Thu, 02 Feb 2006 13:22:15 -0800
> 
> 
> Read and respond to this message at: 
> https://sourceforge.net/forum/message.php?msg_id=3555741
> By: laplace_friend
> 
> I have been experiencing an error with Maxima version 5.9.2
> (development version),
> which I run on a Windows XP pro SP1 w/ AMD athlon64 3000+ processor.
> The commands which can trigger it are the following:
> 
>
s1:-1/2*(sqrt(4*(tzyp+a*tzyx+b*tzyy+c*tzyz)**2+4*(tzxp+a*tzxx+b*tzxy+c*tzxz)**2+
> (szp+a*szx+b*szy+c*szz)**2)-(szp+a*szx+b*szy+c*szz));
> H1: abs(s1)+l*(a**2+b**2+c**2-1);
>
solve([diff(H1,a)=0,diff(H1,b)=0,diff(H1,c)=0,diff(H1,l)=0],[a,b,c,l]);
> 
> The error message I get is the following:
> 
> Maxima encountered a Lisp error:
> 
>  Error in PROGN [or a callee]: The storage for CONS is exhausted.
> Currently, 92537 pages are allocated.
> Use ALLOCATE to expand the space.
> 
> Automatically continuing.
> To reenable the Lisp debugger set *debugger-hook* to nil.
> 
> I think it's related to maxima memory allocation and not to memory
> allocation
> in a Windows o.s.
> When the error happens, the task manager gives the following info:
> 
> 438 Mb of mem used by maxima.exe
> 622 Mb of total used memory
> 
> The physical memory is about 780 Mb, the paging file has constant
> dimesion and
> is 1152 Mb.
> 
> I already noticed that this is not o.s.-dependant (trying to add Win
> SP2 had
> no effect, win 2000 still gives the same error) nor depends on maxima
> versions
> (maxima 5.9.0 (for windows) gives the same output).
> 
> Can anybody give hints? Besides, 1 page = approximately 5 kB, right?
> I'm sorry
> I'm quite new to this program...thank you for your attention.
> 
>
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